416 kit advice

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quartermilepass

quartermilepass

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Hello, I have a 340 block im looking to build there are plenty of kits out there and just wondering peoples thoughts of who to use and who not to use. car is a racecar but still would want to be able to run a pump gas ( super ) and 110 5050 mix or 110 straight at the most. Also if people can give me an estimate of how fast their cars are running with a 416 kit. im sitting right around 2900 lbs 727 trans 4500 stall 4.30 gears soon to be 4.57
 
A word on pump gas... The amount of compression (static) will point the way of pump gas or not only to be trumped by dynamic compression ratio. The bigger the cam, the lower the dynamic ratio will be. Your listed octanes are wide and varied for there abilty.

A little more focus please.
 
340 I have in the car now has 180 psi on each cylinder which what mathematically is around 12:1 ? and I run a 50 50 mix 501 501 cam. plus read fine no hiccups or stumbles 850 carb running 11.80s
 
with the 416 I would stay with the 4.30 gears unless you are running a very tall tire...

how fast depends on alot of things....suspension...cylinder heads...just to name a couple...
 
yeah I understand all that. but I can get a basepoint of what to expect from a couple examples. im running a 27x11.50 I have a 29x12.5 and a 30 as well I can always put on. currently shifting at 6200 going through at 6500. about where I would like t ostay except shift 6500 go through at 6800
 
I had my 416 done at MUSCLE MOTORS...11.1 540 lift 248 duration...Eagle H beam rods...Eagle steel crank flat top pistons...bla bla bla... I run mix of race gas and premium...uleaded race gas for I have a EFI SIX PACK....car runs strong and I shift at 6000 and now have a full manual auto with a 3500 stall and 3.91 rear gears with 28 tall tire.... gears in auto has been changed as well..the car gets up and goes for a nova lol lol
inside joke on this site...
 
Just a few questions. First to make a 340 into a 416 how far are you boring the cylinders. I see most 360 engines are made to 408 but what is the max for one of them. Next question is for dustpan340. What is your actual et and what are you tacking thru the traps?
Why did each poster choose a 340 over the 360? I was always told displacement is key? Just trying to understand Dodge/Chrysler as I have been doing chevys for the last 20 years. I'm now working on a 66 dart which takes me back to my early car days!
Thanks for your answers,
Rodney
 
a 416 is a .030 bored 340 (4.070) with a 4 inch crank...

remember a 340 starts life with a 4.04 bore
 
1977 Volare 3300#. 416 12.5 to 1 1000cfm carb, eddy performer heads port & polished,30X12 tire 5.13 gear. leaves a 2800rpm shift 6800 thru the traps at 7200 - 7300 rpm best time 10.57 @ 121mph turbo blue gas. Been out of racing for 4 years but still have it.
 
rod7515 said:
Just a few questions. First to make a 340 into a 416 how far are you boring the cylinders. I see most 360 engines are made to 408 but what is the max for one of them. Next question is for dustpan340. What is your actual et and what are you tacking thru the traps?
Why did each poster choose a 340 over the 360? I was always told displacement is key? Just trying to understand Dodge/Chrysler as I have been doing chevys for the last 20 years. I'm now working on a 66 dart which takes me back to my early car days!
Thanks for your answers,
Rodney
Click to expand...

70aarcuda said:
a 416 is a .030 bored 340 (4.070) with a 4 inch crank...

remember a 340 starts life with a 4.04 bore
Click to expand...

He may have had a 340 to start with.............

To further expand on Tony's words......

The bore sizes are different. Starting with the above mentioned 340 @ 4.04 and the 360 @ 4.00 Boring a 360 out .040 to catch up to the 340's bore size is a big jump. Though the actual amount a block can be over bored should be the result of knowing how much meat is there to start with. A sonic check will let you know.

IF you take the bore .060 over, which is considered a lot, then;

360 = 4.06
340 = 4.10

The 360 also has wider bearings. If your racing, this creates drag. A most small amount, but racers leave the wider bearings behind. The MoPar engines book is a good thing to have. They have it per engine family. B, RB, LA, Magnum, HEMI. It will explain and show you a lot.

Does anyone know how far a race block will go, Siamese version?
 
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